Composition for patching and setting stones



Patented Feb. 23, 1932 UNITED STATES L Mt New PATENT OFFICE mm DUGAN, OF CHICAGO, ILLINOIS; ANNIE E. WEI-FIELD, EXECUTE OF SAID mm DUGAN, DECEASED, ASSIGNOB '10 HEBSELF AS TRUSTEE GJDOSITION FOB PATCEING AND BEING STONES Io Drawing.

This invention relates to compositions for atchin and settin stones, the object being to produce a compound which is readily and easily applied in filling surface cavities and when thoroughly dried and set closely resembles the stone so that the presence of the atch is not appreciable, the composition aving substantially the same characteristics and durability of the stone itself and being ideal for use as a cement in setting stones in monumental work and building structures. Other particular objects and advantages to be attained will hereinafter more fully appear.

In the production of the composition it is preferable to use Wand more particularly such as oun in cer am quarries 1n the State of Indiana and more commonlv known commercially as Bedford stone.

his particular stone is of roven rengt and durability, and is c aracteristically ideal as a base for the compound of the resent invention. In the process of ma 'ng the composition the stone which is shattered in the uarr in o erations so as to be unsuitable for guiidin ur oses. and the relatively small ieces and cdi s resultm from the dressin oi the Rene are utilized to advantage, thereby making a valuable output I for material which would otherwise be classed as waste or usable for road buildin and the like. The stone is first crushed an reduced to relatively sma pieces of a roxima e um or am: in a k1 n or urnace fr a period 0;

stone are oroug y ecarbonate and crumbled into a power. s resi ue is en coo 51 e he refined residue therea er being orou hly mixed with a high grade commercial olan or hydraulic cegpttoge er wit ca cine v sum.orw a 5 s l t F1 is commercially kn wn a as e f Paris. This mixture is preferably produced in the following proportions:

592' pounds of the prepared Bedford stone; 376 pounds cement; and 350 pounds plaster of Pans.

The above ingredients, in the proportions an l fiwand the action of the elements substantially lme e 3 1c 95 0 as well as the stone itself.

Application fled June 93, 1930. Serial I'o. 464,713.

noted, are thoroughly mixed in the dry state with the addition of matter to give the product the desired tint corresponding to the color of the stone to be atched or set in the monumental or buildmg structure. For example, for patching or setting the grayish gglored stone, about two pounds of yglmw ggler 1s a dc to the above mixture, or w: ou e added coloring ingredient the product is practically white or ight butt in color. Obviously, where the composition is to be used for patching or in conjunction with stones of other colors as, for instance, blue Indiana or red Portage sandstone, Japanese blue or vermilion red may be respectively employed in suitable quantities to produce the desired tint in the composition.

The composition produced in accordance with the present invention closely resembles the characteristic stone to which it is applied, is easily applied when mixed with water to produce a plastic mass of the proper consistency for troweling, sets readily after apglication, and after it is dried and set may chiseled and smoothed in the same manner as the stone itself so as to conform to the surface contour of the stone.

The composition of the present invention may be manufactured and distributed at a low cost and is of high efiiciency in that in its prepared plastic state it adheres with great tenacity to the stone to which it is applied and is capable of withstanding physica wear The product, as above noted, is manufactured in the dry state and distributed commercially in the same condition, it being only necessary to place the mixture in a plastic condition by the mere addition of water at the time of use, and while the ingredients are, for practical purposes, employed in the mixture in substantially the proportions herein specified, it is obvious that the proportions may be varied to some degree without in the least departing from the spirit and scope of the invention as defined y the appended claims. The invention, therefore, is not limited to the specific proportions of the ingredients herein stated.

Having thus described my invention, what I claim as new and desire to secure by Let- 5 ters Patent is:

1. The herein described composition of matter comprising substantially 45 per cent of calcined Bedford stone, 28 per cent of Portland cement, and 27 per cent of plaster m of Paris.

2. The herein described composition of matter comprising a dry mixture consisting of 592 pounds of calcined Bedford stone, 376 pounds of hydraulic cement, and 350 pounds of plaster of Paris.

3. The herein described composition of matter comprising 592 pounds of calcined Bedford stone, 376 ounds of h draulic cement, 350 pounds 0 plaster of aris, and 2 pounds of a coloring ingredient.

In testimony whereof I have signed my name to this specification.

Mas. ANNIE DUGAN. 

